使用车前子时（）A、先煎 B、后下 C、包煎 D、冲服 E、烊化 发布时间：2017-07-20 17:15 │ 来源：www.tikuol.com 题型：单项选择题 问题： 使用车前子时（）A、先煎 B、后下 C、包煎 D、冲服 E、烊化
题型：单项选择题 请仔细阅读题中的学生情况说明，从A—F中选出能解决他们问题的恰当建议。(有一项多余)A．Emily often feels tired and seems to be lack of energy.B．Jeff spent his summer vacation on the beach and got serious sunburnt.C．Kate has poor eyesight and she can’t see clearly at night.D．Tony sometimes feels pains in his bones and he has loose teeth.E. Luke is so careless that he often gets hurt. And it takes a long time for his wound to heal.F. Linda feel nervous before the new people.1.Vitamin AWhat can high-vitamin A foods do for you?be great for night visionhelp you see in colorhelp your grow properly and aids in healthy skin﹡ vitamin A in carrots helps you see at night2.The B vitaminsWhat can the B vitamin do for you?help make energy and set it freehelp make red blood cells which carry oxygen(氧气) throughout your body﹡ The B vitamins in leafy green vegetables help your body make protein(蛋白质)and energy.3.Vitamin CWhat can vitamin C do for you?keep body tissues(组织) in good shapehelp you heal when you get hurt help your body resist infection﹡ Vitamin C in oranges helps your body heal if you get a cut4. Vitamin DWhat can vitamin D do for you?help keep your bones strong and healthyhelp keep your teeth strong and healthyhelp your body absorb the amount of calcium(钙)﹡ Vitamin D in milk helps your bones and teeth. " 5. Vitamin EWhat can vitamin E do for you?protect your skin from ultraviolet(紫外线) lightprotect you lungs from becoming damaged by polluted airhelp make red blood cells﹡ Sunflowers seeds are the richest in Vitamin E 查看答案
题型：单项选择题 在实验室里，常用____或____与____ 反应制得二氧化碳，其化学方程式为_______________。收集二氧化碳只能用____，而不能用________，是因为______________。 查看答案
